Struct ColumnDef 

pub struct ColumnDef {
    pub name: String,
    pub data_type: DataType,
    pub nullable: bool,
    pub default: Option<Vec<u8>>,
    pub vector_dim: Option<u32>,
    pub compress: bool,
    pub enum_variants: Vec<String>,
    pub decimal_precision: u8,
    pub element_type: Option<DataType>,
    pub metadata: HashMap<String, String>,
}

Column definition.

Fields

name: String

Column name.

data_type: DataType

Data type.

nullable: bool

Whether NULL values are allowed.

default: Option<Vec<u8>>

Default value (serialized).

vector_dim: Option<u32>

Vector dimension (for vector columns).

compress: bool

Whether to compress this column’s data.

enum_variants: Vec<String>

Valid enum variants.

decimal_precision: u8

Number of decimal places.

element_type: Option<DataType>

Array element data type.

metadata: HashMap<String, String>

Additional column metadata.

Implementations

impl ColumnDef

pub fn new(name: impl Into<String>, data_type: DataType) -> Self

Create a new column definition.

pub fn not_null(self) -> Self

Make the column non-nullable.

pub fn with_default(self, default: Vec<u8>) -> Self

Set the serialized default value.

pub fn with_vector_dim(self, dimension: u32) -> Self

Set the vector dimension.

pub fn with_metadata( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add a metadata entry.

pub fn compressed(self) -> Self

Enable per-column compression.

pub fn with_variants(self, variants: Vec<String>) -> Self

Set enum variants.

pub fn with_precision(self, precision: u8) -> Self

Set decimal precision.

pub fn with_element_type(self, data_type: DataType) -> Self

Set the array element type.

Trait Implementations

impl Clone for ColumnDef

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnDef

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ColumnDef

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ColumnDef

impl PartialEq for ColumnDef

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ColumnDef